Electric switch.



No. 846,673. PATENTED MAR. 12, 1907.

A. KOBSCHE. ELECTRIC SWITCH.

APPLICATION FILED DEC. 26, 1906.

i J, 59-I- c: --P2 W by UNITED STATES rA-rENror I-o ANDREW KOESCHE, oF-oHIoAo ILLINOIS, ASSIGNORTO THE'LI ID CAR- BoNIo COMPANKOFOHICAGO, ILLINOIS; A GORPORATIONOF ILLINOIS.

' ELECTRIC SWITGH.

\ Specificaticnof Letters Patent, I inseam filed Dar 'Q6,1905.-.eria1l lo293,238.

' Patented m ma 12,1907.

wlbwhom mad a Be it known that I, A nrtn'wKonscnna citizen of sienna-ed States, residing anticago, in the countyfof Cook andSt'ate ofiIIlli- 11015,.h89'6 mventedznew and-useful 1m rovean electric switch of simpleand inexpensive construction and in which the contacts can be widely and quickly separated by a short movement of the operating-handle to prevent sparking and flashing, an terloration of the contacts.

thereby avoid det- The invention has other which will be fully and clearlynointed out hereinafter in the detailed'desci'iption.

In the accompanying drawings illustrating one embodiment of theinvention, Fi ure "1 is a top plan view of a singleole switc Fig. 2 is a sectional view on-the ine 2 2 of Fig. 1, showing the switch closed. Fig. 3 is a similar viewshowing the'switch open. Fig. 4 is .Iac

a sectionon line 4; l-ofFig. 3.

On a suitable base Ala stationary carbon contact B is yieldably mounted in a holder b; a spring I) being located within the holder beneath the contact. A movable contact -C is. adjustably mounted in'a split sleeve a, carried by a contact-lever DJ The holder 1) has abinding-post b, and the sleeve 0 is'clamped 1 D. The other end of this jointed rod is slidon the carbon contact by a screw 0', which could be utilized as a bindingpost in a singlepole switch. .In the. drawin sIhave shown a single-pole switchin -whic there are two stationary contacts and two movable contaste,' but itwill only be necessary to describe one pair; as they are preferably made alike. The two movable contacts are 'oarried on the ends of. a cross-piece d, fastened v to the forward end of the lever D.

The contact-lever D is bifurcated that to'say, it is provided with two arms E, which have theiriouter ends e rounded and fulcrum'cd in bearings-e in theupper'ends of the standards e A handle lever F is also bifurcated, having two arms f similarly rounded at their ends f and nilorumed in bearings "in the standard G. A red H is pivotally jointed at h and pivotally connected at its forward end It to'the contaot lever ably arranged within thehandle-lever', and'a compression-spring hf exerts a constant tenobjects in view .sion on the-trod. for a pu-rpose' hereafter described. The joint h of the rod H is located. between the handle and the fulcrum of the 1 contact-lever. The rod H extends through a yoke 'I,=mountedon the base and provided 'with aset-screw15,, "having a lock-nut i,

- whereby the upward movement of) the rod lica'n'beregulated. QT-he handle-lever F also set cre whereby t upward movement. of the han die-lever can be regulated. .The rulcrums for thearms of 'thhandleor lessoitheir length. These fulcrums {are plane and above the plane of-the stationary contacts, so

w'ardly fromi'ts fulcrum to its free end and its free end, as illustrated in Fig. 2. At this spring the rodwwill cause the rod to swing the con tact-lever quickly a gap between} he contacts or ,s'ufiicient the handle-lever. carries the j oint of the. rod. H above the center .of the fulcrum for the contact-lever. This movement of the-handle-lever is comparatively short by reason of the fact that it fulcrum is located in adand as.the contact is not broken 'untilthe located in substantially the same horizontal time the rod H will be somewhat bent at its joint; but when the handle is raised the rod.

be arranged and adjusted to provide for a e'xtendsfthrough ayoke J, providedwith a 1%,; having thereon a; lock.-nut j,

that. when the switch is closed the contact-lever will be inclined down-.

the handle-lever will be inclined downwardly 1 in the opposite directionfrom its fulcrum to a will straighten out, furthercompressing, the", until the joint of the 'rod- H passes. above the plane of the fulcrum of the con-J v tact-lever, whereupon the spring acting ,on

9. into open position, leaving I width to prevent sparking underhigh vol;v

tionary contacts will, prevent a separation of the contactlever which may occur during the -.i 0o erfect contact is therefore maintained until vance of the fulcrum of the contact-lever,-

handle-lever approaches close to the limitofits upward movement it is apparent that the contact-lever .will beswung quickly to its open position under the influence of the spring h". o By breaking the connection quickly and swinging the movable contacts in a comparatively wide gap avoids flashing and sparking andftherefore prolongs the life of the contacts. i

I have illustrated a single-pole switch, but

" this is only one embodiment of the invention,

and it will be apparent'tha't it can be embodled in double-poleswitches by insulating the cross-piece d and supplying the necessary contacts. f

The handleF is insulated, and its movement is controlled by the length of the handle-leve r. If the handle-lever is reduced in length and the contact-lever is increased in length, the movement of the handle will be lessened and the gap increased-in width.

What I claim, and desire to secure by Letters Patent, is-

1. An electric switch comprising a statlonarycontact, a contact-lever fulcrumed at one end, a movablecontact carried by said lever at its other end, a handlelever arranged in substantial alinement with the contact-lever, said fulcrums being in aplane above the stationary contact, and a springcontrolled rod connected to said handlelever, between its ends and tosaid contactlever between its ends.

3. In an electric switch, the combination of a stationary contact, a contact-lever-fuL crumed at one end, a movable contact carried by the other end'of'said contact-lever, a handle-lever-fulcrumed at one end between the ends of the contact-lever, said fulcrums being in a plane above the stationary contact, a

rod plvotally connected to the contact-lever and slidably arranged in the handle-lever, and a spring within the handle-lever acting on said rod.

4. In an electric switch, the combination of a stationarycontact, acontact-lever fulcrumed at one end, a movable contact carried by said contactrleve'r at its other end, a handlelever fulcrumed at, one end between the ends of the contact-lever,- said fulcrums being 1n a plane above'the stationary contact, a rod pivotally connected at one end to said contact-lever and slidably arranged in the handle-lever, said rod being jointed adjacent to said handle-lever, and a spring within the handle-lever acting on said rod;

5. In an electric'switch, the combination of a stationary contact, a bifurcated contactlever fulcrumed at its bifurcated end, a movable contact carried by the other end of said contact-lever, a handle-lever bifurcated at one end and fulcrumed at its'bifurcated end between the ends of the contact-lever, the bifurcated ends of said contact and handle levers overlapping one another, and yielding means connecting said levers and located Within their bifurcated ends. a

6.In an electric switch, the combination of a base, a stationary contact on the base, standards on the base, a bifurcated contactlever having its bifurcated end fulcrumed in a pair of. sald standards, a movable contact carried by the other-end of said contact-lever, a bifurcated handle lever fulcrumed at its bifurcated' end' in another pair of said standards and located between the ends of. the contact-lever, yielding means connectin said levers and located within their bifurcate ends, and means for limiting the outward movement of said levers.

7i An electric switch comprising a base, a stationary contact on thebase, standards on the base, a bifurcated contact-lever fulcrumed at its bifurcated end in a pair of said standards, a movable contact carried by the other end of said lever, a bifurcated handlelever having its bifurcated end arranged to overlap the bifurcated end of the contactlever, said bifurcated end of the handle-lever bein fulcrumed in another pair of said standardfiocated between the ends of the contactlever, means for limitin the outward movement of said levers, a ro pivotally connected at one 'end to the contact-lever between the movable contact and the fulcrum of the han dle-lever, and having its other end slidably arranged in saidhandle-lever, a compressionspring within the handle-lever and acting on said rod, and ajoint in said rod between said handle-lever and the fulcrum of the contactlever.

, ANDREW KOESCHE Witnesses:

M. A. KIDDIE, P. L. SOHMECHEL. 

